GENERAL INFORMATION

Dataset Title:  Air Traffic Data International Mobility Indicators for the UK

Author/Principal Investigator Information: Laura Pollacci, University of Pisa, laura.pollacci@unipi.it
Co-Investigator Information: Alina Sirbu, University of Pisa, alina.sirbu@unipi.it
Co-Investigator Information: Stefano Maria Iacus, Harvard University, siacus@iq.harvard.edu


DATA & FILE OVERVIEW

Structure/File List: monthly_AirPassengersIndicators.csv, yearly_AirPassengersIndicators.csv

Attributes: 
	- Date: Date at which the passengers was captured (See FILE-SPECIFIC INFORMATION)
	- Origin: Country of departure. In the case of this dataset always UK. 
	- Destination: Country of destination. ISO 3166-1 alpha-2 codes and European Union regions (i.e., Northern, Southern, Western, Central Eastern, and EU27)
	- FLR: logarithm of the ratio between the number of incoming individuals in a given country (e.g., entering the UK) and the number of outgoing individuals in the same observed country (e.g., leaving the UK). (See Codes/Abbreviations)
	- CFLR: logarithm of the ratio between the cumulative incoming flows (e.g., entering the UK) and cumulative outgoing flows (e.g., leaving the UK) up to a current time window t
	- Trend: Trend component resulting from FLR time-series-decomposition performed with Statsmodels ​(McKinney et al., 2011) Python library​ and using additive model with 12 components.
	- Seasonal: Seasonality component resulting from FLR time-series-decomposition performed with Statsmodels ​(McKinney et al., 2011) Python library​ and using additive model with 12 components.
	- Resid: Residual component resulting from FLR time-series-decomposition performed with Statsmodels ​(McKinney et al., 2011) Python library​ and using additive model with 12 components.

Codes/Abbreviations: 
	- FLR: Flow Log Ratio
	- CFLR: Cumulative Flow Log Ratio
	- Northern: Finland, Denmark, Sweden, Estonia, Latvia, Lithuania
	- Southern: Greece, Italy, Malta, Portugal, Cyprus, Spain
	- Western: France, Germany, Ireland, Luxembourg, Netherlands, Austria, Belgium
	- Central Eastern: Hungary, Poland, Romania, Bulgaria, Croatia, Slovakia, Czechia, Slovenia
	- EU27: European Union countries. Aggregation of Northern, Southern, Western, Central Eastern countries. 

File formats: CSV (US-ASCII encoding)


FILE-SPECIFIC INFORMATION FOR: monthly_AirPassengersIndicators.csv
Number of variables: 8
Number of cases/rows: 4128 (heading excluded)
Variable List: Date, Origin, Destination, FLR, CFLR, Trend, Seasonal, Resid.
	- Date: YYYY-MM-DD format

FILE-SPECIFIC INFORMATION FOR: yearly_AirPassengersIndicators.csv
Number of variables: 5
Number of cases/rows: 352 (heading excluded)
Variable List: Date, Origin, Destination, FLR, CFLR.
	- Date: YYYY format

References:
McKinney, W., Perktold, J., & Seabold, S. (2011). Time series analysis in python with statsmodels. Jarrodmillman. Com, 96–102. 